A radio frequency transmission control apparatus for preventing an oscillation in a wideband wireless local loop terminal has a radio frequency transmitting unit for modulating a baseband transmitting signal to a WLL radio frequency band signal and transmitting the modulated signal via an antenna, and the radio frequency transmitting unit is divided into a radio frequency converting unit and a power amplifier unit in accordance with characteristics of each active element constituting the radio frequency transmitting unit. When a power is supplied to the radio frequency transmitting unit, the power is first supplied to the radio frequency converting unit so as to maintain the same at an operating state. After a predetermined time period has elapsed, the power is supplied to the power amplifier unit. When the radio frequency transmitting unit is cut off from a power, a cutoff of the power amplifier unit is performed prior to a cutoff of the radio frequency converting unit, to thereby prevent generation of an oscillation frequency in W-WLL terminal.
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March 3, 2000
April 15, 2003
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